I have worked for the past three years as a writing and French tutor at a University in Wisconsin, working with writing and grammar in both languages, and eventually managed the school’s group of writing tutors as Head Writing Tutor. One of my biggest personal beliefs is that students should understand both the how and the why of a concept. If I tell you to put a comma there without telling you why, it’s not going to do you any good with comma use in the future. If you don’t understand why a …